translated intro, install, quick start and meet the team pages in Italian

[GabMus]

Also added necessary infrastructure for translation. The current partial translation directory structure can be used as a boilerplate for future translation contributions.

[vonPB]

@GabMus can u please resolve the 2 things above and maybe delete all the non-translated pages, so we dont clutter the repo and make it harder to translate to the current version :)